/*
  ==============================================================================

   This file is part of the JUCE framework.
   Copyright (c) Raw Material Software Limited

   JUCE is an open source framework subject to commercial or open source
   licensing.

   By downloading, installing, or using the JUCE framework, or combining the
   JUCE framework with any other source code, object code, content or any other
   copyrightable work, you agree to the terms of the JUCE End User Licence
   Agreement, and all incorporated terms including the JUCE Privacy Policy and
   the JUCE Website Terms of Service, as applicable, which will bind you. If you
   do not agree to the terms of these agreements, we will not license the JUCE
   framework to you, and you must discontinue the installation or download
   process and cease use of the JUCE framework.

   JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
   JUCE Privacy Policy: https://juce.com/juce-privacy-policy
   JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/

   Or:

   You may also use this code under the terms of the AGPLv3:
   https://www.gnu.org/licenses/agpl-3.0.en.html

   THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
   WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.

  ==============================================================================
*/

namespace juce
{

class FileChooserDialogBox::ContentComponent final : public Component
{
public:
    ContentComponent (const String& name, const String& desc, FileBrowserComponent& chooser)
        : Component (name),
          chooserComponent (chooser),
          okButton (chooser.getActionVerb()),
          cancelButton (TRANS ("Cancel")),
          newFolderButton (TRANS ("New Folder")),
          instructions (desc)
    {
        addAndMakeVisible (chooserComponent);

        addAndMakeVisible (okButton);
        okButton.addShortcut (KeyPress (KeyPress::returnKey));

        addAndMakeVisible (cancelButton);
        cancelButton.addShortcut (KeyPress (KeyPress::escapeKey));

        addChildComponent (newFolderButton);

        setInterceptsMouseClicks (false, true);
    }

    void paint (Graphics& g) override
    {
        text.draw (g, getLocalBounds().reduced (6)
                        .removeFromTop ((int) text.getHeight()).toFloat());
    }

    void resized() override
    {
        const int buttonHeight = 26;

        auto area = getLocalBounds();

        text.createLayout (getLookAndFeel().createFileChooserHeaderText (getName(), instructions),
                           (float) getWidth() - 12.0f);

        area.removeFromTop (roundToInt (text.getHeight()) + 10);

        chooserComponent.setBounds (area.removeFromTop (area.getHeight() - buttonHeight - 20));
        auto buttonArea = area.reduced (16, 10);

        okButton.changeWidthToFitText (buttonHeight);
        okButton.setBounds (buttonArea.removeFromRight (okButton.getWidth() + 16));

        buttonArea.removeFromRight (16);

        cancelButton.changeWidthToFitText (buttonHeight);
        cancelButton.setBounds (buttonArea.removeFromRight (cancelButton.getWidth()));

        newFolderButton.changeWidthToFitText (buttonHeight);
        newFolderButton.setBounds (buttonArea.removeFromLeft (newFolderButton.getWidth()));
    }

    FileBrowserComponent& chooserComponent;
    TextButton okButton, cancelButton, newFolderButton;
    String instructions;
    TextLayout text;
};

//==============================================================================
FileChooserDialogBox::FileChooserDialogBox (const String& name,
                                            const String& instructions,
                                            FileBrowserComponent& chooserComponent,
                                            bool shouldWarn,
                                            Colour backgroundColour,
                                            Component* parentComp)
    : ResizableWindow (name, backgroundColour, parentComp == nullptr),
      warnAboutOverwritingExistingFiles (shouldWarn)
{
    content = new ContentComponent (name, instructions, chooserComponent);
    setContentOwned (content, false);

    setResizable (true, true);
    setResizeLimits (300, 300, 1200, 1000);

    content->okButton.onClick        = [this] { okButtonPressed(); };
    content->cancelButton.onClick    = [this] { closeButtonPressed(); };
    content->newFolderButton.onClick = [this] { createNewFolder(); };

    content->chooserComponent.addListener (this);

    FileChooserDialogBox::selectionChanged();

    if (parentComp != nullptr)
        parentComp->addAndMakeVisible (this);
    else
        setAlwaysOnTop (WindowUtils::areThereAnyAlwaysOnTopWindows());
}

FileChooserDialogBox::~FileChooserDialogBox()
{
    content->chooserComponent.removeListener (this);
}

//==============================================================================
#if JUCE_MODAL_LOOPS_PERMITTED
bool FileChooserDialogBox::show (int w, int h)
{
    return showAt (-1, -1, w, h);
}

bool FileChooserDialogBox::showAt (int x, int y, int w, int h)
{
    if (w <= 0)  w = getDefaultWidth();
    if (h <= 0)  h = 500;

    if (x < 0 || y < 0)
        centreWithSize (w, h);
    else
        setBounds (x, y, w, h);

    const bool ok = (runModalLoop() != 0);
    setVisible (false);
    return ok;
}
#endif

void FileChooserDialogBox::centreWithDefaultSize (Component* componentToCentreAround)
{
    centreAroundComponent (componentToCentreAround, getDefaultWidth(), 500);
}

int FileChooserDialogBox::getDefaultWidth() const
{
    if (auto* previewComp = content->chooserComponent.getPreviewComponent())
        return 400 + previewComp->getWidth();

    return 600;
}

//==============================================================================
void FileChooserDialogBox::closeButtonPressed()
{
    setVisible (false);
}

void FileChooserDialogBox::selectionChanged()
{
    content->okButton.setEnabled (content->chooserComponent.currentFileIsValid());

    content->newFolderButton.setVisible (content->chooserComponent.isSaveMode()
                                          && content->chooserComponent.getRoot().isDirectory());
}

void FileChooserDialogBox::fileDoubleClicked (const File&)
{
    selectionChanged();
    content->okButton.triggerClick();
}

void FileChooserDialogBox::fileClicked (const File&, const MouseEvent&) {}
void FileChooserDialogBox::browserRootChanged (const File&) {}

void FileChooserDialogBox::okButtonPressed()
{
    if (warnAboutOverwritingExistingFiles
         && content->chooserComponent.isSaveMode()
         && content->chooserComponent.getSelectedFile (0).exists())
    {
        auto options = MessageBoxOptions::makeOptionsOkCancel (MessageBoxIconType::WarningIcon,
                                                               TRANS ("File already exists"),
                                                               TRANS ("There's already a file called: FLNM")
                                                                  .replace ("FLNM", content->chooserComponent.getSelectedFile (0).getFullPathName())
                                                                 + "\n\n"
                                                                 + TRANS ("Are you sure you want to overwrite it?"),
                                                               TRANS ("Overwrite"),
                                                               TRANS ("Cancel"),
                                                               this);
        messageBox = AlertWindow::showScopedAsync (options, [this] (int result)
        {
            if (result != 0)
                exitModalState (1);
        });
    }
    else
    {
        exitModalState (1);
    }
}

void FileChooserDialogBox::createNewFolderCallback (int result, FileChooserDialogBox* box,
                                                    Component::SafePointer<AlertWindow> alert)
{
    if (result != 0 && alert != nullptr && box != nullptr)
    {
        alert->setVisible (false);
        box->createNewFolderConfirmed (alert->getTextEditorContents ("Folder Name"));
    }
}

void FileChooserDialogBox::createNewFolder()
{
    auto parent = content->chooserComponent.getRoot();

    if (parent.isDirectory())
    {
        auto* aw = new AlertWindow (TRANS ("New Folder"),
                                    TRANS ("Please enter the name for the folder"),
                                    MessageBoxIconType::NoIcon, this);

        aw->addTextEditor ("Folder Name", String(), String(), false);
        aw->addButton (TRANS ("Create Folder"), 1, KeyPress (KeyPress::returnKey));
        aw->addButton (TRANS ("Cancel"),        0, KeyPress (KeyPress::escapeKey));

        aw->enterModalState (true,
                             ModalCallbackFunction::forComponent (createNewFolderCallback, this,
                                                                  Component::SafePointer<AlertWindow> (aw)),
                             true);
    }
}

void FileChooserDialogBox::createNewFolderConfirmed (const String& nameFromDialog)
{
    auto name = File::createLegalFileName (nameFromDialog);

    if (! name.isEmpty())
    {
        auto parent = content->chooserComponent.getRoot();

        if (! parent.getChildFile (name).createDirectory())
        {
            auto options = MessageBoxOptions::makeOptionsOk (MessageBoxIconType::WarningIcon,
                                                             TRANS ("New Folder"),
                                                             TRANS ("Couldn't create the folder!"));
            messageBox = AlertWindow::showScopedAsync (options, nullptr);
        }

        content->chooserComponent.refresh();
    }
}

} // namespace juce
